Door-hinge



UNITED sTATEs PATENT oEEIcE S. M. BULLARD, OF HOLLISTON, MASSACHUSETTS.

DOOR-HINGE.

Specification of Letters Patent No. 17,419', dated June 2, 1857.

To aZZ wiz-om t may concern:

Be it known that I, S.4 M. BULLARD, of Holliston, in the county ofMiddlesex and State of Massachusetts, have invented a new and usefulhinge for doors, gates, blinds, or shutters for the purpose of closingthe same by their own weight as the motive power, which I have named aSelf-Closing Door-Hinge; and I do hereby declare that the following is afull and exact description thereof.

My hinge consists of four pieces or partsmade or iron or other metal,and for a better understanding of it-s form and operation, reference ishere made to the accompanying drawings.

vWhat I claim as my invention, is the detached antifriction roller,grooved or hollowed on its edge moving between two circular inclinedplanes, .which are formed upon the edges of cup-shaped pieces, connectedwith the flanges of the hinge, the upper inclined plane to the flangeattached t-o the door, and the lower inclined plane to the flangeattached to the door frame.

Figure l is a sectional view of the hinge when closed. Fig. 2 is a viewof the hinge one quarter open, or in the position it would be when thedoor was at right angles to its frame. Fig. 3 is a sectional view of thehinge when open, or with the door back against the wall. Fig. 4 is aview of the spindle, shaft or pin upon which the other parts areoperated. Figs. 5 and 6 the roller.

A, Figs. l, 2, and 3, represents the cupshaped part upon which is formedthe lower inclined plane, and is attached to, or forms a part of theflange which is fastened to the door frame; 0, is the lower part of thesame through which the spindle C, passes to give it steadiness.

B, Figs. l, 2, and 3, represents the cupshaped part upon which is formedthe upper inclined plane, and is attached to, or forms a part of theflange which is fastened to the door; o is the lower part of the samethrough which the spindle C, passes to give it steadiness.

D, Figs. 2 and 5, represents, a front view of the roller.

D, Fig. 6, represents sectional viewn of the roller, g, g, its groove orhollow which guides and retains it upon the inclined planes.

D, Figs. l and 3, represents a perspective view of the roller.

E, Figs. l, 2, and 3, represents the body part of the hinge, throughwhich the spindle C, passes, and has a solid connect-ion with thecup-shape parts A and B, and the flanges F.

n, o, n, Figs. l and 3, represent a sectional view of the cup-shapedparts A. and B. n, e, n, Fig. 2, represent-s a front view of the same.

Zt, z', j, Figs. 1 and 2, represent the lower inclined plane, and Za, Z,m, Fig. 2, represent-s the upper inclined plane.

D, Fig. l, shows the' roller at rest upon the point Zz, at the bottom ofthe lower inclined plane ZL, ,j, with the point sat the top of the upperinclined plane c, Z, m, resting upon the top of the roller D,consequently the whole weight of the door hangs or bearsupon the roller,and as the door is opened the roller commences ascending the lowerinclined plane z, z', y', and the upper inclined plane Zc, Z, m, passesup above, or over the roller D, as is shown in Fig. 2, where the hingeis one quarter open, and 0, the lower part of B, has risen one half ofthe distance from p, to s, and the rollerl D, is seen in the middle ofthe inclined planes, between the points z' and Z.

D, Fig. 3, shows the roller at rest at the top of the lower inclinedplane Zz, z', j, or upon the level y', n, with the point m, or the levelm, n, resting upon the top of the roller, and c, the lower part of B,raised the whole distance from p to s; in this position the door willremain open, or stand at rest, but if left free to .itself at anyintermediate point, its own weight will immediately cause it to close.

r, Figs. 2 and 3, represent the screw holes through the flanges F, andfw, Fig. 3, rep resents the reaming or countersinks, for the heads ofthe screws.

C, Fig. 4, represent-s the spindle, a, its4 But one of these hinges isneeded upon a door, the other or others shouldbe the loose or sliphinges, allowing the door to rise as it opens, and descend as it closes.

This hinge can be made without the lower part, consisting only of theparts repre-v sented above the dotted line t, u, which passes throughFigs. l and 4, and when thus made, but three pieces or parts are needed,the spindle, shaft or pin can form a solid part of the body of the hingeE, this will lessen its cost, but it will not be as firm and steady asthe one represented by my drawings. It can also be made with an upperpart corresponding with the lower part, which would add to its strengthand rmness, and bring the inclined planes or cupshaped pieces in or nearthe middle of the hinge.

I do not confine myself to any inclination, or length of the inclinedplanes, the steeper, or quicker the ascent of the inclined planes, thesooner, and with greater force will the door close; they may be made ofany length,

so that the roller will pass on to a level and allow the doors to rest,or stand open at any angle or position desired.

I do not confine myself to any size of the circle, or circumference ofthe inclined planes, their size or distance from the center of thespindle may be varied at pleasure.

Ido not conne myself to any size of the detached antifriction roller,its size is irnmaterial, the effect is the same.

I do not confine myself to any particular outward' form of the severalparts, they may be made plain or ornamental at pleasure.

I do not claim the inclined planes as my invention, for they have beenlong known and used, but

What I do claim, is,

The detached antifrietion roller, inserted between the inclined planes,in the manner and for the purpose above described.

S. M. BULLARD.

Witnesses:

NATHANV MORTE, CHAs. H. DONNELLY.

